· 1994 Medical University Sofia - Faculty of Dental Medicine
· 2000 Oral Surgery, Department of Maxillofacial Surgery and Plastic Surgery
· Aesthetic and Dental Medicine
· Oral Implantology
· Periodontal Surgery
· Soft and soft tissue augmentation
· Many courses in prosthetics over implants
· Courses for development of complex prosthetic construction
· Bone Grafting
· Sinus Lift
· Course "Face Fillers and Revitalizants"
· Participated in several symposia and congresses of Dental Medicine in Bulgaria and abroad
· Dr. Gais is one of the few dental doctors capable to provide adequate, complex oral rehabilitation - an adequate treatment of the problems of different nature(when available functional, aesthetic, periodontal and surgical of one and same patient)
· 2000 He opened dental clinic "Dr. Gais", which did not take long to become one of the best dental centers not only in Bulgaria but also in Europe. He receives World and European awards for quality and professionalism.
· In 2011, Frankfurt, Dr. Gais gets world award in gold category for quality and professionalism -The International Arch of Europe Award. He was awarded by one of the most prominent organizations in the world - B.I.D. He was elected by anonymous survey of the organization for his outstanding contribution in their field of nominees from 116 countries in the world.
· December 2011, Brussels, Dr. Gais receives a European award for Best Practice - 2011 by the "European Society for Quality" (European Society for Quality Research - ESQR).
· Winner of the grand prize in the third edition of the Bulgarian competition "Dental Practice Manager".
· Won the special award "Outstanding contribution and Innovation in Bulgarian dentistry".
· Winner of the honorary title "The Name in Science" by the International Committee "Socrates", European Business Assembly.
· Consultant for television shows and magazines.
· Member of the "Bulgarian Academy of Cosmetic Dentistry" and "Bulgarian Society of periodontics and oral implantology".
· Dr. Gais is consultant in medical-dental Center of Multifunctional Hospital “Tsaritsa Ioana”.
· 16 yearsof experience in the field of aesthetic dentistry and implantology, in which hehas had more than 10,000 smiling patients